A Dangerous Engagement by Ashley Weaver

Amory and Milo have crossed the Atlantic to attend her friend’s wedding. Tabitha Alden was a schoolmate of Amory’s but she returned to New York after her mother’s death. Her father lost a lot of money in the stock market crash but he seems to have recouped his investments, at least if the car that picks up Amory and Milo is anything to go by.
They get to Mr. Alden’s house and meet the rest of the wedding party: Tabitha’s fiancé Tom who seems to have no past beyond four or five years ago; Jemma Petrie, a friend of Tabitha’s and the only other bridesmaid; Rudy Elliot, a friend of Tom’s who is in marketing, most recently for a salad dresssing, his father was one of the men who committed suicide after the crash; and Grant Palmer, a confident man who is rumored to be in with the mob. In a quiet moment, Tabitha confesses to Amory that she believes that Grant is trying to lure her father into the mob business. When Amory overhears the two men talking, it seems they know each other better than they pretend.
Amory also witnesses Tom fighting with Grant; it seems Tom doesn’t want his past to come up again. But that could be for any reason, really. Perhaps he thinks his Midwestern past won’t fly with the high social group that is the circle Tabitha moves in.
And with Grant being the most unpleasant person in this book, it isn't hard to believe that he’s the one who ends up dead, shot several times outside the Alden house. Milo and Amory are dragged into the underworld.
Another great book in the series.

Four stars
Follows An Act of Villainy
Followed by A Deception at Thornecrest
ARC kindly provided by St. Martin's Press and NetGalley
Opinions are my own